DC Inverter U-match Series Floor Ceiling Type Unit 
21
5.3.5 Checking the Pipe Connections for Gas Leaking 
For both indoor and outdoor unit side, check the joints for gas leaking by the use of 
a gas leakage detector without fail when the pipes are connected. 
5.3.6 Heat Insulation on the Pipe Joints (Indoor Side Only) 
Stick coupler heat insulation (large and small) to the place where connecting pipes. 
 
Fig. 4.14 
5.3.7 Liquid Pipe and Drain Pipe 
(1).  If the outdoor unit is installed lower than 
the indoor unit (See Fig. 4.15) 
1). A  drain  pipe  should  be  above  ground 
and  the  end  of  the  pipe  does  not  dip 
into water. All pipes must be restrained 
to the wall by saddles. 
2). Taping  pipes  must  be  done  from 
bottom to top. 
3). All  pipes  are  bound  together  by  tape 
and restrained to wall by saddles.